Energizer Ultimate Lithium 9V Batteries, 2 Pack

Energizer innovation delivers up to 10-year battery backup in AC-powered smoke detectors. This 9-volt lithium battery lasts up to 20 percent longer in toys vs. Energizer MAX batteries and weighs 1/4 less than standard alkaline. It performs in extreme temperatures from negative 40 to 140 degrees Fahrenheit. Leak-resistant construction.